Electrophysical Characteristics of Temperature and Humidity Sensors Based on Carbon-Containing PLA Plastic
https://doi.org/10.35596/1729-7648-2026-24-3-14-20
Abstract
The electrophysical characteristics of 3D-printed temperature and humidity sensors based on a conductive PLA composite with carbon filler are studied. Relationships are established between the morphology of the structure obtained by fused deposition, the topology of the conductive tracks, and the frequency-dependent response to changes in temperature and relative humidity. It is shown that extrusion through a nozzle and layer-by-layer track formation increase the specific resistance of a single track by 3–4 times compared to the original filament due to interlayer boundaries, porosity, and partial rearrangement of the percolation network. It is noted that the serial topology provides the highest relative response, while the parallel topology provides the lowest baseline resistance. A negative temperature coefficient of resistance is observed in the range of 20–100 °C, and as the humidity changes from 40 to 100 %, the nature of the signal depends on the measurement frequency. It is shown that in the low and medium frequency region the resistance changes weakly and is mainly determined by barrier percolation transport, whereas at 100 kHz a weak contribution of interfacial polarization and capacitive shunting can appear.
About the Authors
M. Lobanok
Belarusian State University
Belarus
Belarus
Lobanok Mikhail, Cand. Sci. (Phys. and Math.), Associate Professor of the Department of Physical Electronics and Nanotechnologies
220064, Minsk, Kurchatova St., 5
Tel.: +375 29 654-09-53
I. Chizhov
Belarusian State University
Belarus
Belarus
Chizhov I., Postgraduate of Physical Electronics and Nanotechnologies Department
Minsk
M. Paulyshka
Belarusian State University
Belarus
Belarus
Paulyshka M., Researcher at the Research Laboratory of Information and Measuring Systems
Minsk
A. Pototsky
Belarusian State University
Belarus
Belarus
Pototsky A., Student
Minsk
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Review
For citations:
Lobanok M., Chizhov I., Paulyshka M., Pototsky A. Electrophysical Characteristics of Temperature and Humidity Sensors Based on Carbon-Containing PLA Plastic. Doklady BGUIR. 2026;24(3):14-20. (In Russ.) https://doi.org/10.35596/1729-7648-2026-24-3-14-20
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